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RTI Connext .Net APIs
Version 5.1.0
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Various settings that configure how a DDS::DataWriter allocates and uses physical memory for internal resources. More...
#include <managed_infrastructure.h>
Static Public Member Functions | |
| static System::String^ | get_datawriterresourcelimits_qos_policy_name () |
| Stringified human-readable name for DDS::DataWriterResourceLimitsQosPolicy. | |
Public Attributes | |
| System::Int32 | initial_concurrent_blocking_threads |
| The initial number of threads that are allowed to concurrently block on write call on the same DDS::DataWriter. | |
| System::Int32 | max_concurrent_blocking_threads |
| The maximum number of threads that are allowed to concurrently block on write call on the same DDS::DataWriter. | |
| System::Int32 | max_remote_reader_filters |
| The maximum number of remote DataReaders for which the DDS::DataWriter will perform content-based filtering. | |
| System::Int32 | initial_batches |
| Represents the initial number of batches a DDS::DataWriter will manage. | |
| System::Int32 | max_batches |
| Represents the maximum number of batches a DDS::DataWriter will manage. | |
| DataWriterResourceLimitsInstanceReplacementKind | instance_replacement |
| Sets the kinds of instances allowed to be replaced when instance resource limits are reached. | |
| System::Int32 | initial_virtual_writers |
| The initial number of virtual writers supported by a DDS::DataWriter. | |
| System::Int32 | max_virtual_writers |
| The maximum number of virtual writers supported by a DDS::DataWriter. | |
| System::Int32 | max_remote_readers |
| The maximum number of remote readers supported by a DDS::DataWriter. | |
| System::Int32 | max_app_ack_remote_readers |
| The maximum number of application-level acknowledging remote readers supported by a DDS::DataWriter. | |
Properties | |
| System::Boolean | replace_empty_instances [get, set] |
| Whether or not to replace empty instances during instance replacement. | |
| System::Boolean | autoregister_instances [get, set] |
| Whether or not to automatically register new instances. | |
Various settings that configure how a DDS::DataWriter allocates and uses physical memory for internal resources.
DataWriters must allocate internal structures to handle the simultaneously blocking of threads trying to call DDS::TypedDataWriter::write on the same DDS::DataWriter, for the storage used to batch small samples, and for content-based filters specified by DataReaders.
Most of these internal structures start at an initial size and, by default, will be grown as needed by dynamically allocating additional memory. You may set fixed, maximum sizes for these internal structures if you want to bound the amount of memory that can be used by a DDS::DataWriter. By setting the initial size to the maximum size, you will prevent RTI Connext from dynamically allocating any memory after the creation of the DDS::DataWriter.
This QoS policy is an extension to the DDS standard.
| System::Int32 DDS::DataWriterResourceLimitsQosPolicy::initial_concurrent_blocking_threads |
The initial number of threads that are allowed to concurrently block on write call on the same DDS::DataWriter.
This value only applies if DDS::HistoryQosPolicy has its kind set to ::DDS::HistoryQosPolicyKind::KEEP_ALL_HISTORY_QOS and DDS::ReliabilityQosPolicy::max_blocking_time is > 0.
[default] 1
[range] [1, 10000], <= max_concurrent_blocking_threads
| System::Int32 DDS::DataWriterResourceLimitsQosPolicy::max_concurrent_blocking_threads |
The maximum number of threads that are allowed to concurrently block on write call on the same DDS::DataWriter.
This value only applies if DDS::HistoryQosPolicy has its kind set to ::DDS::HistoryQosPolicyKind::KEEP_ALL_HISTORY_QOS and DDS::ReliabilityQosPolicy::max_blocking_time is > 0.
[default] DDS::ResourceLimitsQosPolicy::LENGTH_UNLIMITED
[range] [1, 10000] or DDS::ResourceLimitsQosPolicy::LENGTH_UNLIMITED, >= initial_concurrent_blocking_threads
| System::Int32 DDS::DataWriterResourceLimitsQosPolicy::max_remote_reader_filters |
The maximum number of remote DataReaders for which the DDS::DataWriter will perform content-based filtering.
[default] 32
[range] [0, (2^31)-2] or DDS::ResourceLimitsQosPolicy::LENGTH_UNLIMITED.
0: The DDS::DataWriter will not perform filtering for any DDS::DataReader.
1 to (2^31)-2: The DataWriter will filter for up to the specified number of DataReaders. In addition, the Datawriter will store the result of the filtering per sample per DataReader.
DDS::ResourceLimitsQosPolicy::LENGTH_UNLIMITED: The DataWriter will filter for up to (2^31)-2 DataReaders. However, in this case, the DataWriter will not store the filtering result per sample per DataReader. Thus, if a sample is resent (such as due to a loss of reliable communication), the sample will be filtered again.
| System::Int32 DDS::DataWriterResourceLimitsQosPolicy::initial_batches |
Represents the initial number of batches a DDS::DataWriter will manage.
[default] 8
[range] [1,100 million]
| System::Int32 DDS::DataWriterResourceLimitsQosPolicy::max_batches |
Represents the maximum number of batches a DDS::DataWriter will manage.
[default] DDS::ResourceLimitsQosPolicy::LENGTH_UNLIMITED
When batching is enabled, the maximum number of samples that a DDS::DataWriter can store is limited by this value and DDS::ResourceLimitsQosPolicy::max_samples.
[range] [1,100 million] or DDS::ResourceLimitsQosPolicy::LENGTH_UNLIMITED >= DDS_RtpsReliableWriterProtocol_t::heartbeats_per_max_samples if batching is enabled
| DataWriterResourceLimitsInstanceReplacementKind DDS::DataWriterResourceLimitsQosPolicy::instance_replacement |
Sets the kinds of instances allowed to be replaced when instance resource limits are reached.
When a DDS::DataWriter's number of active instances is greater than DDS::ResourceLimitsQosPolicy::max_instances, it will try to make room by replacing an existing instance. This field specifies the kinds of instances allowed to be replaced.
If a replaceable instance is not available, either an out-of-resources exception will be returned, or the writer may block if the instance reclamation was done when writing.
[default] ::DDS::DataWriterResourceLimitsInstanceReplacementKind::UNREGISTERED_INSTANCE_REPLACEMENT
| System::Int32 DDS::DataWriterResourceLimitsQosPolicy::initial_virtual_writers |
The initial number of virtual writers supported by a DDS::DataWriter.
[default] 1
[range] [1, 1000000], or DDS::ResourceLimitsQosPolicy::LENGTH_UNLIMITED
| System::Int32 DDS::DataWriterResourceLimitsQosPolicy::max_virtual_writers |
The maximum number of virtual writers supported by a DDS::DataWriter.
Sets the maximum number of unique virtual writers supported by a DDS::DataWriter, where virtual writers are added when samples are written with the virtual writer GUID.
This field is specially relevant in the configuration of Persistence Service DataWriters since these DataWriters will publish samples on behalf of multiple virtual writers.
[default] DDS::ResourceLimitsQosPolicy::LENGTH_UNLIMITED
[range] [1, 1000000], or DDS::ResourceLimitsQosPolicy::LENGTH_UNLIMITED
| System::Int32 DDS::DataWriterResourceLimitsQosPolicy::max_remote_readers |
The maximum number of remote readers supported by a DDS::DataWriter.
[default] DDS::ResourceLimitsQosPolicy::LENGTH_UNLIMITED
[range] [1, 1000000], or DDS::ResourceLimitsQosPolicy::LENGTH_UNLIMITED
| System::Int32 DDS::DataWriterResourceLimitsQosPolicy::max_app_ack_remote_readers |
The maximum number of application-level acknowledging remote readers supported by a DDS::DataWriter.
[default] DDS::ResourceLimitsQosPolicy::LENGTH_UNLIMITED
[range] [1, 1000000], or DDS::ResourceLimitsQosPolicy::LENGTH_UNLIMITED
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getset |
Whether or not to replace empty instances during instance replacement.
When a DDS::DataWriter has more active instances than allowed by DDS::ResourceLimitsQosPolicy::max_instances, it tries to make room by replacing an existing instance. This field configures whether empty instances (i.e. instances with no samples) may be replaced. If set true, then a DDS::DataWriter will first try reclaiming empty instances, before trying to replace whatever is specified by DDS::DataWriterResourceLimitsQosPolicy::instance_replacement.
[default] false
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getset |
Whether or not to automatically register new instances.
[default] true
When set to true, it is possible to write with a non-NIL handle of an instance that is not registered: the write operation will succeed and the instance will be registered. Otherwise, that write operation would fail.
RTI Connext .Net APIs Version 5.1.0
Copyright © Mon Feb 3 2014
Real-Time Innovations, Inc